Supercritical Fluids Safety The greatest safety concern is the use of high pressure components in the process equipment. CO2 gas can cause suffocation resulting from lack of oxygen. The threshold limit value (TLV) is 5,000 ppm. CO2 is nonflammable and mostly inert. State Information | Glossary | Conversion Checklist | Comments Home | Process Advisor | Alternatives | Links | Search All SAGE material, Copyright© 1992, Research Triangle Institute Last Update: 18 March 1995 sage@rti.org http://clean.rti.org/alt.cfm?id=sc&cat=sa